dpctl: Add support to count upcall packets.

Add support to count upcall packets per port, both succeed and failed,
which is a better way to see how many packets upcalled on each interface.

Acked-by: Eelco Chaudron <echaudro@redhat.com>
Signed-off-by: wangchuanlei <wangchuanlei@inspur.com>
Signed-off-by: Ilya Maximets <i.maximets@ovn.org>

NEWS

@@ -1,5 +1,9 @@
 Post-v3.1.0
 --------------------
+   - Linux kernel datapath:
+     * OVS now collects per-interface upcall statistics that can be obtained
+       via 'ovs-appctl dpctl/show -s' or the interface's statistics column
+       in OVSDB.  Available with upstream kernel 6.2+.
 
 
 v3.1.0 - xx xxx xxxx

include/linux/openvswitch.h

@@ -301,11 +301,25 @@ enum ovs_vport_attr {
 	OVS_VPORT_ATTR_PAD,
 	OVS_VPORT_ATTR_IFINDEX,
 	OVS_VPORT_ATTR_NETNSID,
+	OVS_VPORT_ATTR_UPCALL_STATS,
 	__OVS_VPORT_ATTR_MAX
 };
 
 #define OVS_VPORT_ATTR_MAX (__OVS_VPORT_ATTR_MAX - 1)
 
+/**
+ * enum ovs_vport_upcall_attr - attributes for %OVS_VPORT_UPCALL* commands
+ * @OVS_VPORT_UPCALL_ATTR_SUCCESS: 64-bit upcall success packets.
+ * @OVS_VPORT_UPCALL_ATTR_FAIL: 64-bit upcall fail packets.
+ */
+enum ovs_vport_upcall_attr {
+	OVS_VPORT_UPCALL_ATTR_SUCCESS,
+	OVS_VPORT_UPCALL_ATTR_FAIL,
+	__OVS_VPORT_UPCALL_ATTR_MAX,
+};
+
+#define OVS_VPORT_UPCALL_ATTR_MAX (__OVS_VPORT_UPCALL_ATTR_MAX - 1)
+
 enum {
 	OVS_VXLAN_EXT_UNSPEC,
 	OVS_VXLAN_EXT_GBP,

include/openvswitch/netdev.h

@@ -87,6 +87,10 @@ struct netdev_stats {
     uint64_t rx_oversize_errors;
     uint64_t rx_fragmented_errors;
     uint64_t rx_jabber_errors;
+
+    /* Datapath upcall statistics. */
+    uint64_t upcall_packets; /* Rx packets forwarded to userspace. */
+    uint64_t upcall_errors;  /* Rx packets failed forwarding to userspace. */
 };
 
 /* Structure representation of custom statistics counter */

lib/dpctl.c

@@ -750,6 +750,10 @@ show_dpif(struct dpif *dpif, struct dpctl_params *dpctl_p)
                 print_stat(dpctl_p, "  TX bytes:", s.tx_bytes);
                 print_human_size(dpctl_p, s.tx_bytes);
                 dpctl_print(dpctl_p, "\n");
+
+                print_stat(dpctl_p, "    UPCALL packets:", s.upcall_packets);
+                print_stat(dpctl_p, " errors:", s.upcall_errors);
+                dpctl_print(dpctl_p, "\n");
             } else {
                 dpctl_print(dpctl_p, ", could not retrieve stats (%s)",
                             ovs_strerror(error));

lib/dpif-netlink.c

@@ -4685,6 +4685,8 @@ dpif_netlink_vport_from_ofpbuf(struct dpif_netlink_vport *vport,
                                    .optional = true },
         [OVS_VPORT_ATTR_OPTIONS] = { .type = NL_A_NESTED, .optional = true },
         [OVS_VPORT_ATTR_NETNSID] = { .type = NL_A_U32, .optional = true },
+        [OVS_VPORT_ATTR_UPCALL_STATS] = { .type = NL_A_NESTED,
+                                          .optional = true },
     };
 
     dpif_netlink_vport_init(vport);
@@ -4716,6 +4718,21 @@ dpif_netlink_vport_from_ofpbuf(struct dpif_netlink_vport *vport,
     if (a[OVS_VPORT_ATTR_STATS]) {
         vport->stats = nl_attr_get(a[OVS_VPORT_ATTR_STATS]);
     }
+    if (a[OVS_VPORT_ATTR_UPCALL_STATS]) {
+        const struct nlattr *nla;
+        size_t left;
+
+        NL_NESTED_FOR_EACH (nla, left, a[OVS_VPORT_ATTR_UPCALL_STATS]) {
+            if (nl_attr_type(nla) == OVS_VPORT_UPCALL_ATTR_SUCCESS) {
+                vport->upcall_success = nl_attr_get_u64(nla);
+            } else if (nl_attr_type(nla) == OVS_VPORT_UPCALL_ATTR_FAIL) {
+                vport->upcall_fail = nl_attr_get_u64(nla);
+            }
+        }
+    } else {
+        vport->upcall_success = UINT64_MAX;
+        vport->upcall_fail = UINT64_MAX;
+    }
     if (a[OVS_VPORT_ATTR_OPTIONS]) {
         vport->options = nl_attr_get(a[OVS_VPORT_ATTR_OPTIONS]);
         vport->options_len = nl_attr_get_size(a[OVS_VPORT_ATTR_OPTIONS]);

lib/dpif-netlink.h

@@ -44,6 +44,8 @@ struct dpif_netlink_vport {
     uint32_t n_upcall_pids;
     const uint32_t *upcall_pids;           /* OVS_VPORT_ATTR_UPCALL_PID. */
     const struct ovs_vport_stats *stats;   /* OVS_VPORT_ATTR_STATS. */
+    uint64_t upcall_success;               /* OVS_VPORT_UPCALL_ATTR_SUCCESS. */
+    uint64_t upcall_fail;                  /* OVS_VPORT_UPCALL_ATTR_FAIL. */
     const struct nlattr *options;          /* OVS_VPORT_ATTR_OPTIONS. */
     size_t options_len;
 };

lib/netdev-linux.c

@@ -2156,16 +2156,16 @@ swap_uint64(uint64_t *a, uint64_t *b)
  * 'src' is allowed to be misaligned. */
 static void
 netdev_stats_from_ovs_vport_stats(struct netdev_stats *dst,
-                                  const struct ovs_vport_stats *src)
+                                  const struct dpif_netlink_vport *vport)
 {
-    dst->rx_packets = get_32aligned_u64(&src->rx_packets);
+    dst->rx_packets = get_32aligned_u64(&vport->stats->rx_packets);
-    dst->tx_packets = get_32aligned_u64(&src->tx_packets);
+    dst->tx_packets = get_32aligned_u64(&vport->stats->tx_packets);
-    dst->rx_bytes = get_32aligned_u64(&src->rx_bytes);
+    dst->rx_bytes = get_32aligned_u64(&vport->stats->rx_bytes);
-    dst->tx_bytes = get_32aligned_u64(&src->tx_bytes);
+    dst->tx_bytes = get_32aligned_u64(&vport->stats->tx_bytes);
-    dst->rx_errors = get_32aligned_u64(&src->rx_errors);
+    dst->rx_errors = get_32aligned_u64(&vport->stats->rx_errors);
-    dst->tx_errors = get_32aligned_u64(&src->tx_errors);
+    dst->tx_errors = get_32aligned_u64(&vport->stats->tx_errors);
-    dst->rx_dropped = get_32aligned_u64(&src->rx_dropped);
+    dst->rx_dropped = get_32aligned_u64(&vport->stats->rx_dropped);
-    dst->tx_dropped = get_32aligned_u64(&src->tx_dropped);
+    dst->tx_dropped = get_32aligned_u64(&vport->stats->tx_dropped);
     dst->multicast = 0;
     dst->collisions = 0;
     dst->rx_length_errors = 0;
@@ -2179,6 +2179,8 @@ netdev_stats_from_ovs_vport_stats(struct netdev_stats *dst,
     dst->tx_fifo_errors = 0;
     dst->tx_heartbeat_errors = 0;
     dst->tx_window_errors = 0;
+    dst->upcall_packets = vport->upcall_success;
+    dst->upcall_errors = vport->upcall_fail;
 }
 
 static int
@@ -2196,7 +2198,7 @@ get_stats_via_vport__(const struct netdev *netdev, struct netdev_stats *stats)
         return EOPNOTSUPP;
     }
 
-    netdev_stats_from_ovs_vport_stats(stats, reply.stats);
+    netdev_stats_from_ovs_vport_stats(stats, &reply);
 
     ofpbuf_delete(buf);
 

vswitchd/bridge.c

@@ -2626,7 +2626,9 @@ iface_refresh_stats(struct iface *iface)
     IFACE_STAT(rx_undersized_errors,    "rx_undersized_errors")     \
     IFACE_STAT(rx_oversize_errors,      "rx_oversize_errors")       \
     IFACE_STAT(rx_fragmented_errors,    "rx_fragmented_errors")     \
-    IFACE_STAT(rx_jabber_errors,        "rx_jabber_errors")
+    IFACE_STAT(rx_jabber_errors,        "rx_jabber_errors")         \
+    IFACE_STAT(upcall_packets,          "upcall_packets")           \
+    IFACE_STAT(upcall_errors,           "upcall_errors")
 
 #define IFACE_STAT(MEMBER, NAME) + 1
     enum { N_IFACE_STATS = IFACE_STATS };